The siren series In-ear monitors are named after famous rock songs about women.
Jerry Harvey Audio produced a special version of the Roxanne tuned for the Astell&Kern in 2014. The collaboration was so successful that the two companies will now release two more models.
The first new model is the Layla. This all new flagship model is nothing short of stunning visually as well as sonically....

If the Playaz N1 were designed with reasonable amount of bass and they could be the steal of the century. In reality I can recommend them for EQ-friendly folks only - stay away if your source does not have a good, user customizable EQ.